Antoniouk, A. Vict., O. M. Kiselev, and N. N. Tarkhanov. 2014. “Asymptotic Solutions of the Dirichlet Problem for the Heat Equation at a Characteristic Point”. Ukrains’kyi Matematychnyi Zhurnal 66 (10), 1299–1317. https://umj.imath.kiev.ua/index.php/umj/article/view/2223.